Survey research is a type of quantitative research that involves collecting data from a large number of people using questionnaires or surveys.

Content analysis is a type of qualitative research that involves analyzing the content of texts, images, or other forms of media.

The purpose of a research design is to explain a phenomenon by identifying the factors that cause it and the relationships between those factors.

A true experiment is a type of experimental research design in which the researcher randomly assigns participants to different treatment groups and then compares the outcomes of those groups.

An observational study is a type of non-experimental research design in which the researcher observes participants in their natural setting without manipulating any variables.

A cross-sectional study collects data from a single group of participants at one point in time, while a longitudinal study collects data from the same group of participants over a period of time.

The purpose of a case study is to describe a phenomenon in detail, often by examining a single case or a small number of cases.

All of the above are types of action research.

The purpose of action research is to solve a problem in a real-world setting, generate new knowledge, and empower participants in the research process.

All of the above are types of mixed methods research.

The purpose of mixed methods research is to combine the strengths of quantitative and qualitative research, overcome the limitations of quantitative and qualitative research, and generate new insights that would not be possible with either quantitative or qualitative research alone.

A longitudinal study is a type of research design that is used to study change over time by following the same group of participants over a period of time.

A correlational study is a type of research design that is used to study the relationship between two or more variables by measuring the extent to which they are associated.

An experimental study is a type of research design that is used to test a hypothesis by manipulating one or more variables and observing the effect of that manipulation on the outcome variable.

A quasi-experimental study is a type of research design that is used to evaluate the effectiveness of a program or intervention by comparing the outcomes of two or more groups that are not randomly assigned.